This is the 367th most frequent Greek word.
έρθει
The Greek word "έρθει" means "come" or "arrive."
Here, 'έρθει' is used in the future form indicating that the action of coming is expected to happen.
Θα έρθει με το αυτοκίνητο ή με το τρένο;
Will he come by car or by train?
In this case, 'έρθει' reflects a possibility or uncertainty, indicative of its use in a dependent, potentially subjunctive, clause expressing doubt or contingency.
Ίσως έρθει αργότερα, αν τελειώσει τη δουλειά του.
He might come later if he finishes his work.
In this sentence, 'έρθει' is used in a hypothetical subjunctive form to express that someone must come in the context of a condition or necessity.